Interior Painting Cost in NJ (2026): Per Room and Square Foot

Interior painting in New Jersey usually costs $2 to $6 per square foot of home, which works out to about $3,000 to $9,000 for a 1,500 square foot house, according to 2026 national cost guides. One bedroom runs about $240 to $800. The 5th Wall's published planning range for a full home interior in Central New Jersey is $3,000 to $8,000.

Three things move the price more than anything else: how much of the house you paint (walls only, or ceilings, trim and doors too), how much repair the walls need first, and whether the house was built before 1978. In an older house, any paid painter must follow the EPA's lead-safe rules, and that changes both the price and who can do the job. New Jersey also charges sales tax on painting labor, which the national cost guides leave out.

Want a real number for your house? Request a free estimate or call (609) 954-3659. See what our painting service covers, from patching and priming to trim and cabinets.

Interior Painting Cost in NJ at a Glance#

These are market ranges, not a quote. HomeAdvisor's figures were updated June 17, 2026 and This Old House's April 20, 2026. Both are national, not adjusted for New Jersey. A walk-through of your house sets the real price.

Cost to Paint One Room#

Sources: HomeAdvisor, updated June 17, 2026; This Old House, updated April 20, 2026.

Room size makes the biggest price difference, HomeAdvisor says, with larger spaces costing more.

What a 12x12 room costs to paint#

A 12 by 12 foot bedroom with 8 foot ceilings has about 384 square feet of wall (4 walls x 12 feet x 8 feet) and a 144 square foot ceiling. Using This Old House's surface rates:

Windows and doors take a little off the wall area. Trim adds $1 to $3 per linear foot (This Old House).

Cost by House Size: 1,000 to 2,500 Square Feet#

Sources: This Old House, updated April 20, 2026; Taskrabbit, updated October 1, 2026. HomeAdvisor's table gives the same $2,000 to $6,000 for 1,000 square feet and $5,000 to $15,000 for 2,500 (HomeAdvisor).

Where your house lands inside each range depends, in This Old House's words, on "your chosen paint type, home size, location, and other factors": which surfaces are painted, how much repair the walls need, and how many coats a color change takes.

Worked example: a 1,500 square foot house#

Here is how the national figures land on a 1,500 square foot house:

• HomeAdvisor's $2 to $6 per square foot: $3,000 to $9,000
• This Old House's range for the size: $1,500 to $6,000
• Taskrabbit's range for the size: $3,000 to $9,000

That spread is why two quotes for the same house can be thousands of dollars apart. Before you compare them, check that both price the same surfaces, the same number of coats and the same repair work.

Ceilings, Trim, Doors and Stairs#

Walls are only part of the job. This Old House lists these add-ons (This Old House):

• Ceilings: $1 to $2.50 per square foot, depending on texture
• Trim: $1 to $3 per linear foot, about $500 to $1,500 for a 1,500 square foot home
• Interior doors: $40 to $100 each
• Stairways: $15 to $30 per linear foot
• Closets, nooks and pantries: $50 to $150 each
• Cabinets: $3 to $8 per square foot on small projects

HomeAdvisor's two averages show the same thing from the other side: about $2.75 per square foot for walls, and about $4.70 per square foot for walls, trim and ceilings (HomeAdvisor).

Why Labor Is Most of the Bill#

HomeAdvisor says labor makes up 75% to 95% of the total cost of a painting job (HomeAdvisor). Paint is the small part. Time is the big part, and much of that time is prep before any color goes on:

• Moving and covering furniture and floors
• Patching holes and cracks
• Caulking gaps along trim
• Priming patches and bare spots

Our painting service includes surface prep, patching and priming, and furniture and flooring protection, because proper prep is what lets paint last 7 to 10 years. Ask every painter to write down what prep is included, so you are comparing the same work. Low-VOC and eco-friendly paints are among the options we offer.

Pre-1978 Homes: The EPA Lead-Safe Rule#

This is the part of the price the national cost guides above don't explain, and it matters in Mercer County.

Why it matters here#

In 1978, the federal government banned the sale of lead-based paint for use in homes. The EPA estimates that 87% of homes built before 1940 are likely to have lead-based paint, 69% of homes built from 1940 to 1959, and 24% of homes built from 1960 to 1977 (EPA).

Mercer County has a lot of those houses. Of its 152,264 housing units, 94,103 (61.8%) were built before 1980, and 26,416 (17.3%) before 1940, according to the Census Bureau's American Community Survey 2024 1-year estimates, table B25034 (Census Reporter). The Census groups 1970 to 1979 together, so 1980 is the closest cutoff to 1978 that it reports.

In Lawrence, the oldest housing around Lawrenceville village includes 1940s and 1950s Cape Cods with plaster walls (Lawrence Township page). In Hamilton, the classic starter home is a 1940s to 1950s Cape Cod (Hamilton page).

What the rule requires#

The EPA's Renovation, Repair and Painting (RRP) rule requires that anyone paid to do work that disturbs painted surfaces in homes, childcare facilities and preschools built before 1978 be certified (EPA). For a paint job, that means:

• When it applies. Small jobs are exempt only if they disturb 6 square feet of paint or less per room inside the house, or 20 square feet or less outside (EPA). Scraping or sanding more than that in a room brings the paint job under the rule.
• Who can do it. The firm must be EPA-certified, and the crew must be certified renovators or trained on the job by one (EPA). A firm's certification lasts 5 years (40 CFR 745.89). A renovator's lasts 3 years with online training or 5 years with hands-on training (EPA).
• A pamphlet first. No more than 60 days before work starts, the firm must give the owner EPA's Renovate Right pamphlet (40 CFR 745.84).
• Banned methods. Open-flame burning of painted surfaces is prohibited. Power sanding, grinding and similar machines are prohibited on painted surfaces unless they have a shroud and a HEPA vacuum attachment. Heat guns are allowed only below 1,100 degrees Fahrenheit (40 CFR 745.85).
• Containment and cleanup. The work area must be marked with warning signs and isolated before work starts, and cleaned until no dust, debris or residue remains when it ends (40 CFR 745.85).
• Records. The firm must keep its compliance records for 3 years after the job (40 CFR 745.86).

The rule generally does not apply to homeowners working on their own pre-1978 homes (EPA). It does apply to anyone you pay.

What it does to the price#

Containment, warning signs, HEPA vacuums, wet cleaning and the cleaning check all take time and material. Our historic Princeton renovation guide puts the added cost at typically 10 to 15 percent of the cost of work that disturbs painted surfaces. The more painted surface a job disturbs, the more of the job those steps cover.

How to check a painter#

Ask for the firm's EPA certificate and the name of the certified renovator who will be on your job. You can look up certified firms with EPA's lead-safe firm search. The 5th Wall is EPA Lead-Safe Certified for work on homes built before 1978 (see our licensing page).

New Jersey Sales Tax on Painting Labor#

Here is a New Jersey cost the national guides above don't mention. The Division of Taxation lists "painting interior or exterior of house" as a maintenance service, and maintenance labor is taxable (NJ Division of Taxation, S&U-2). New Jersey's sales tax rate is 6.625% (NJ Division of Taxation).

How it shows up on your bill, per S&U-2:

• The contractor charges sales tax on the labor portion of a taxable job.
• The contractor may not charge you sales tax on the materials and supplies used for the job. (The contractor pays tax when buying them.)
• If the bill is one lump sum that doesn't separate labor from materials, you pay sales tax on the whole amount.

An example with round numbers: a $4,000 paint job with $3,200 of labor and $800 of paint and supplies listed separately carries $212 of sales tax on the labor. Billed as one $4,000 lump sum, the tax is $265. Ask for labor and materials as separate lines.

The same publication lists the initial painting of new construction among its examples of exempt capital improvements, so repainting an existing room and painting brand-new work are taxed differently. Ask your contractor how your job will be billed.

Plaster Walls in Older Mercer County Homes#

Many older Mercer County houses still have plaster walls, from the 1940s and 1950s Cape Cods around Lawrenceville village (Lawrence Township page) to Trenton's pre-war homes (Trenton page). Cracks and old patches in plaster have to be repaired and primed before painting, and that prep time is labor, the biggest line on the bill. Our historic Princeton renovation guide lists plaster repair among the items that make older-home work cost more.

In a pre-1978 house, repairing plaster disturbs old painted surfaces, which is where the lead-safe rule above comes in.

How Long Interior Painting Takes#

From The 5th Wall's published town pages, such as our Lawrence painting page:

• One room: 1 to 2 days
• A full interior for a standard home: 3 to 5 days, including prep, priming, two coats and cleanup

Cabinet painting takes 5 to 7 days (painting page). Add time for heavy plaster repair or lead-safe setup.

When to Paint the Inside of a New Jersey House#

Interior painting can be done in any season, because the work happens inside the house. What matters is the temperature in the room while the paint goes on and dries. Paint makers list an application temperature range for each product. One common interior line, Benjamin Moore's Ben Interior Matte, lists 50 to 90 degrees Fahrenheit, a 1 hour dry time and a 2 hour recoat time (Benjamin Moore). Read the label of the product on your job.

In a New Jersey winter, that means keeping the heat on in the rooms being painted so they stay inside the label's range. For choosing colors in New Jersey light, see our paint color guide.

How to Get Painting Quotes You Can Compare#

New Jersey's Division of Consumer Affairs requires home improvement contractors, a group that includes painters, to register with the state (NJ Consumer Affairs). Its consumer brief, revised January 13, 2025, also says:

• Contracts for home improvement projects costing more than $500 must be written and must include the contractor's legal name, business address, registration number, start and completion dates, a description of the work and the total price.
• The contract should state the brand names or quality grades of materials.
• You can cancel a signed contract for any reason before midnight of the third business day after you receive a copy.
• Be wary of a contractor who asks for more than a third of the total payment before work begins.

Then ask every painter the same questions in writing:

1. 1Which surfaces are included: walls, ceilings, trim, doors, closets?
2. 2How many coats, and is primer included?
3. 3What prep is included, and how is extra repair priced?
4. 4Which paint brand and grade, and which sheen in each room?
5. 5If the house was built before 1978: is your firm EPA-certified, and who is the certified renovator on site?
6. 6Are labor and materials listed separately on the bill?
7. 7How will furniture, floors and fixtures be protected?

The 5th Wall is NJ HIC #13VH14128900 and carries $2M in general liability coverage. We are a father-and-son team based in Lawrence, and we paint homes across Mercer County as part of our painting service, on its own or as part of a remodel. Not sure what a bigger project would cost? Try our home renovation cost calculator.

Ready to price your paint job? Request a free estimate or call (609) 954-3659.

Sources#

• HomeAdvisor, cost to paint the interior of a house, updated June 17, 2026
• This Old House, interior painting cost, updated April 20, 2026
• Taskrabbit, interior painting cost guide, updated October 1, 2026
• EPA, Renovation, Repair and Painting Program, updated June 17, 2026
• EPA, RRP Program for Contractors, updated March 31, 2026
• EPA, RRP Program Rules, updated December 15, 2025
• EPA, Protect Your Family from Sources of Lead, updated October 5, 2026
• 40 CFR Part 745, Subpart E (eCFR), sections 745.84, 745.85, 745.86 and 745.89
• EPA, lead-safe certified firm search
• U.S. Census Bureau, ACS 2024 1-year, table B25034, Mercer County (Census Reporter)
• NJ Division of Taxation, S&U-2, Sales Tax and Home Improvements, Rev. 9/17
• NJ Division of Taxation, sales tax rate
• NJ Division of Consumer Affairs, Hiring Home Improvement Contractors, revised January 13, 2025
• Benjamin Moore, Ben Interior Paint, Matte

Photo: two paint rollers on a white interior wall ("Anonymous People Painting The Wall") by Blue Bird, free to use under the Pexels License, via Pexels.